preciousjeni,
I agree that people seem to have varying definitions of what a "multicultural" sorority is and is supposed to be. In my experience, I've seen organizations define themselves as multicultural when they fall under your definition (which I agree with) of a cultural organization with multicultural membership. Personally, I don't care what people define themselves as, as long as they are up front with pnms about who they are. I have met more than one person who thought a organization was multicultural in the way your sorority and mine define it, but they actually were culturally based with a multicultural membership.
Sororities like MSU are confusing because they are bound to a Latino frat and they use a lot of spanish language references. I don't understand how an organization where the name is written in Greek and Spanish and line names, nicknames, ect are all in Spanish, can be classified as multicultural, because to me, it doesn't seem to invite everyone, just people who speak Spanish. I think that the idea of culturally based, multicultural membership would apply to that organization..or maybe they are historically multicultural??